APA (7th ed.) Citation

Boyle, A., & Boyle, N. (2003). The challenge of God: Exploring morality (3rd ed.). Gill & Macmillan.

Chicago Style (17th ed.) Citation

Boyle, Anne, and Niall Boyle. The Challenge of God: Exploring Morality. 3rd ed. Dublin: Gill & Macmillan, 2003.

MLA (9th ed.) Citation

Boyle, Anne, and Niall Boyle. The Challenge of God: Exploring Morality. 3rd ed. Gill & Macmillan, 2003.